It is given that 2 x 37 x 47 x 67 x 97 = 22 603 522. How many positive even factors of 22 603 522 are there?
Hint：Is 2 x 37 a positive even factor?Is 2 x 47 x 67 a positive even factor?
permutations and combinations
2011-03-08 2:37 am
回答 (1)
2011-03-08 2:38 am
✔ 最佳答案
Even factors must contain a factor of 2, i.e. = 2*?*?so the possible factors must be 2 times some of the other factors
number of even factors:
4C0 + 4C1 + 4C2 + 4C3+ 4C4 = 16
收錄日期: 2021-04-20 00:11:23
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